<template>
 <el-container class="home-container">
   <!-- 头部区域 -->
  <el-header>
    <div>
      <img src="../assets/heima.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="back">退出</el-button></el-header>
  <!-- 页面主体区域 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollpse ?'64px' : '200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏菜单区域 -->
       <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409eff"
      :unique-opened="true"
      :collapse="isCollpse"
      :collapse-transition="false"
      router
      :default-active="activePath">
      <!-- 一级菜单 -->
            <el-submenu :index="item.id +''" v-for="item in menuList" :key="item.id">
              <!-- 一级菜单模板区域 -->
              <template slot="title">
                <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{item.authName}}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id"
              @click="saveNavState('/' + subItem.path)">
                <template slot="title">
                  <!-- 图标 -->
                  <i class="el-icon-menu"></i>
                  <!-- 文本 -->
                  <span>{{subItem.authName}}</span>
                </template>
              </el-menu-item>
            </el-submenu>
      </el-menu>
    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  data () {
    return {
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠菜单，默认不折叠
      isCollpse: false,
      // 被激活链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('avtivePath')
  },
  methods: {
    back () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.console.error(res.meta.msg)
      this.menuList = res.data
      console.log(res)
    },
    // 切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollpse = !this.isCollpse
    },
    // 保存连接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('avtivePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-size: 20px;
  >div{
    display: flex;
    align-items: center;
    span{
      margin-left: 20px;
    }
  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}
.el-main{
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
